[jdk25u] RFR: 8362972: C2 fails with unexpected node in SuperWord truncation: IsFiniteF, IsFiniteD

[Fei Yang]

Hi all,

This pull request contains a backport of commit [9f796da3](https://github.com/openjdk/jdk/commit/9f796da3774b2e2f92dca178fdccd93989919256) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Wang Haomin on 23 Jul 2025 and was reviewed by Tobias Hartmann and Jasmine Karthikeyan.

Thanks!

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Commit messages:
 - Backport 9f796da3774b2e2f92dca178fdccd93989919256

Changes: https://git.openjdk.org/jdk25u/pull/222/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u&pr=222&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8362972
  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk25u/pull/222.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u.git pull/222/head:pull/222

PR: https://git.openjdk.org/jdk25u/pull/222